Shown with a cast-on count of 2 stitches.  

• Row 1 (RS): K2.
• Row 2: P2.
• Row 3: K1, yo, k1, yo (4 sts).
• Rows 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, and 42: Purl.
• Row 5: [K1, yo] 4 times (8 sts).
• Row 7: [K1, yo, k3, yo] twice (12 sts).
• Row 9: [K1, yo, k5, yo] twice (16 sts).
• Row 11: [K1, yo, k7, yo] twice (20 sts).
• Row 13: [K1, yo, k9, yo] twice (24 sts).
• Row 15: [K1, yo, k11, yo] twice (28 sts).
• Rows 17 and 29: [Ssk, yo, k4, sl1-k2tog-psso, k4, yo, k1, yo] twice.
• Rows 19 and 31: [Ssk, yo, k3, sl1-k2tog-psso, k3, yo, k3, yo] twice.
• Row 21: [Ssk, yo, k2, sl1-k2tog-psso, k2, yo, k5, yo] twice.
• Row 23: [Ssk, yo, k1, sl1-k2tog-psso, k1, yo, k7, yo] twice.
• Row 25: [Ssk, yo, sl1-k2tog-psso, yo, k9, yo] twice.
• Row 27: [Sl1-k2tog-psso, yo, k11, yo] twice.
• Row 33: [Ssk, yo, k2, sl1-k2tog-psso, k2, yo, k1, yo, sl1-k2tog-psso, yo, k1, yo] twice.
• Row 35: [Ssk, yo, k1, sl1-k2tog-psso, k1, yo, k3, yo, k1, yo, k3, yo] twice (32 sts).
• Row 37: [Ssk, yo, sl1-k2tog-psso, yo, k1, yo, sl1-k2tog-psso, yo, sl1-k2tog-psso, yo, sl1-k2tog-psso, yo, k1, yo] twice (28 sts).
• Row 39: [Sl1-k2tog-psso, yo, k3, yo, k1, yo, k3, yo, k1, yo, k3, yo] twice (36 sts).
• Row 41: [Sl1-k2tog-psso, yo, sl1-k2tog-psso, yo, sl1-k2tog-psso, yo, sl1-k2tog-psso, yo, sl1-k2tog-psso, yo, sl1-k2tog-psso, yo] twice (24 sts).